JPS6229384A - Interphone system - Google Patents

Abstract

PURPOSE:To observe the state in the vicinity of gate door of a house by means of a television set in the house by providing a video image switching means selecting one of video signals outputted from a video image pickup means and sending it to a video receiver means. CONSTITUTION:When a visitor uses a ten-key 11 of a common gate door set 1 to input a number of a house to be visited and depresses a call key 13, the common gate door set 1 retrieves a house set address and sends a signal to a transmission line 9. A floor adaptor 7 supervises always the line 9 and when a start signal is detected, an address signal is analyzed and a control signal is analyzed to activate a relay 75 of a video display control section 72. Then relay contacts 73, 74 are thrown respectively to the position of normally open contact (a), a television receiver 4 is disconnected from a doorphone camera 6 by the relay contact 34 and connected to a gate door camera 2 in the path of a common contact (c) of the relay contact 73 to the normally open contact (a) and from the normally open contact (a) of the relay contact 74 to the common contact (c). Thus, a visited house can observe a visitor to the common gate door by the television receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an intercom system suitable for application to a housing complex management system used in housing complexes such as condominiums, dormitories, and apartments.

[Background of the Invention] Recently, in housing complexes such as condominiums, efforts have been made to provide a safe, comfortable, and convenient living environment for each unit and resident, as well as to perform rational and appropriate maintenance and management of the housing complex. Various housing management systems have been adopted.

Such a system includes, for example, a central monitoring board as the main device in a manager's room or monitoring center, a home controller (housing information board) as a terminal in each dwelling unit, and a communal entrance at the common entrance. In addition to installing devices such as A machine, these devices are connected by audio, video, transmission lines, etc., and there is an intercom function for making calls between the home controller and the common entrance device, and a communication function from the home controller to the common entrance device. The function is to unlock or open the door of the common entrance via the common entrance device based on the command of An alarm function that generates an alarm from a predetermined home controller in response to signals from sensors, a function to monitor common entrances or passages from a central monitoring panel using a TV camera, and a function to specify a desired home controller from the central monitoring panel. It has various functions such as broadcasting function. In addition, a television receiver is installed in each dwelling unit, and the common entrance is displayed on this television receiver.
Alternatively, a system has been proposed that can display images from a television camera installed near the entrance of each dwelling unit.

By the way, in such a conventional system, the television receiver in each dwelling unit could only display images near the entrance of that dwelling unit or at the common entrance. Therefore, if only the area near the entrance of each dwelling unit is displayed, visitors will not be able to see the image until they are near the entrance of each unit; on the other hand, if only the common entrance is displayed, the visitor will not be able to see There was an inconvenience that if you visited a residential unit and stopped by without passing through the common entrance, you could not confirm the person on the video. Furthermore, when selectively displaying one of multiple images on one television receiver,
It is common to multiplex these images, but the usual method of multiplexing video signals between the camera and the TV is as follows:
There is only frequency modulation by a carrier wave like TV radio waves,
In particular, there was a disadvantage that the receiving side circuit became complicated.

[Object of the Invention] The present invention has been made in view of the problems in the above-mentioned conventional example, and it allows each dwelling unit to monitor both the common entrance and the vicinity of the entrance of the dwelling unit using a television set installed in the dwelling unit. The object of the present invention is to provide an intercom system that allows observation by the user. .

[Structure of the Invention] In order to achieve the above object, the present invention provides a telephone communication means, a video reception means, and a first video photographing means in each dwelling unit, and a calling telephone means and a second video photographing means are provided at a common entrance. and between the first and second image capturing means and the image receiving means, a video imager for selecting one of the video signals outputted from these video image means and transmitting the selected image signal to the video image receiving means. It is characterized by being provided with a switching means.

Further, according to one embodiment of the present invention, the above switching is controlled based on a dwelling unit call signal from the communal VA machine. For example, only for the called dwelling unit, the image receiving means is switched and connected to the image capturing means on the communal entrance side.

[Description of Example 1 Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a connection diagram of an intercom system according to an embodiment of the present invention. In the figure, 1 is a common entrance machine, 2 is an entrance camera, and these common entrance machine 1 and entrance camera 2 are installed at the common entrance.

3 is the unit unit (intercom base unit), 4 is the TV receiver,
5 is a doorphone; 6 is a doorphone camera; a dwelling unit unit 3 and a television receiver 4 are installed in each dwelling unit; and a doorphone 5 and a doorbell camera 6 are installed at the entrance of each dwelling unit. Further, the door phone 5 is connected to the dwelling unit 4.

Reference numeral 7 denotes a two-way adapter that is installed on each floor and controls calls and video display of a plurality of dwelling units 3 on that floor.

The floor adapter 7 on each floor is connected in series to the common entrance machine via a communication line 8, a transmission line TA9, and a video line (coaxial cable) 10. Also, this floor adapter 7
consists of a transmission control section 71 and a video display control section 72,
The transmission control unit 71 is connected to lines for controlling calls such as calls and ringer generation from each dwelling unit 3, footer up/down signal lines, signal lines for various sensors, and the like. In this way, a floor adapter 7 is provided for each floor, and by using this floor adapter 7 to perform transmission control and switching of calls, etc., which were conventionally performed for each unit 3, each unit F1
13 is simplified, which more than compensates for the disadvantage of multi-wire wiring between the floor adapter and each dwelling unit.

FIG. 2 shows a detailed wiring diagram of the video display control unit 72 for one house in the system of FIG. 1. In the same figure, a video display control section 72 consists of a relay 75 having two transfer contacts 73 and 74. Here, the coaxial cable 10 for transmitting video signals from the entrance camera 2 is connected to the common contact C of the relay contact 73, the coaxial cable 61 for transmitting video signals from the doorbell camera 6 is connected to the normally closed contact of the relay contact 74, and TV reception ff1a! The video signal receiving coaxial cable 41 at t4 is connected to the common contact C of the relay contacts 74. Further, the relay solenoid 75 is connected to the transmission control section 7.
1 (FIG. 1), on/off control is performed in synchronization with call control.

Next, the operation of this system will be explained. The communal entrance machine 1 and the floor adapter 7 each include a CPU such as a microprocessor (not shown), a memory, etc., and perform the following operations under the control of these CPUs.

When the system is on standby, the relay 75 of the floor adapter 7 is not energized, and the television receiver 114 is connected to the doorbell camera 6 via the relay contact 74, so that images of the vicinity of the entrances of each dwelling unit are displayed.

Further, the entrance camera 2 is connected to the upper floor through each relay contact 73 of the floor adapter on each floor, and further to a terminating resistor (not shown), and is grounded via this terminating resistor.

In this system, foreigners who arrive at the common entrance are
The user inputs the number of the residential unit to be visited using the numeric keypad 11 of the communal entrance device 1, confirms the entered residential unit number using the numeric display 12, and presses the call key 13. Then, in the common entrance unit 1, the CPU searches for the unit address of the unit based on the key-entered unit number, and sends a signal consisting of a start signal, unit address, control signal (calling signal), etc. to the transmission line. Send on 9th.

On the other hand, the floor adapter 7 constantly monitors the transmission line 9, and upon detecting the start signal sent to the transmission line 9, analyzes the following address signal. If the address is for one of the residential units connected to itself, the next control signal is further analyzed. Here, if this control signal is a calling signal, a calling circuit (not shown) of the corresponding dwelling unit 3 is driven to generate a ringing sound, and the relay 75 of the video display control section 72 is turned on.

Therefore, the relay contacts 73 and 74 are switched to the normally open contact a side, and the television receiver 1a4 is separated from the doorbell camera 6 by the relay contact 74, and the relay contact 7
The coaxial cable 1'0 is routed from the common contact C of the relay contact 74 to the normally open contact a and from the normally open contact a of the relay contact 74 to the common contact C.
? In other words, it is connected to the entrance camera 2. Thereby, in the called dwelling unit, visitors to the common entrance can be observed on the television receiver. In addition, when connecting the entrance camera 2 to the television receiver 4, the relay contact 73 disconnects the coaxial cable 10 leading to the upper floor and connects the coaxial cable 33 to the coaxial cable on the upper floor.
This prevents deterioration of the image on the television receiver 4 due to the reflection of the image signal.

When the handset 31 of the dwelling unit 3 is hooked up in response to this ringing tone, the floor adapter 7 detects this footer up and connects the communication circuit of the dwelling unit 3 to the communication line 8, and sends a start signal to the corresponding dwelling unit. machine address and 1
A signal consisting of an ill, nll signal (hookup signal), etc. is sent to the transmission line 9.

In the common entrance example 1, upon receiving this hook-up signal, it connects its own communication circuit to the communication line 8. This allows mutual communication between the communal entrance device 1 and the called dwelling unit using the microphone 14, the speaker 15, and the band set 31.

In the called dwelling unit, if the visitor is confirmed by the video to the television receiver 4 and the handset call, and the door opening key 32 of the dwelling unit 3 is pressed, a door opening signal is transmitted from the dwelling unit 3 to the common entrance mi. Then, a door (not shown) at the common entrance opens, allowing visitors to enter the apartment complex. Furthermore, if the handset 31 is hooked down after the end of the call, the floor adapter 7 detects this hook-down, cuts off the communication circuit of the dwelling unit 3 from the communication line 8, and controls the control unit 72 to display the video.
The relay 75 is deenergized, the television receiver 4 is switched to the doorphone television 6 side, and a hook-down signal is sent to the communal entrance unit 1 via the transmission line 9 in the same format as the footer-up signal. When the communal entrance device 1 receives this hook-down signal, it disconnects its own communication circuit from the communication line 8 and returns to a standby state in preparation for the next visitor.

Further, when the visitor invited through the common entrance arrives at the entrance of the desired dwelling unit, the doorbell camera 6 captures the visitor. At this time, the television receiver 4 in the dwelling unit is connected to the doorphone camera 6 side, and the resident of the dwelling unit can know that the visitor has arrived at the entrance of the dwelling unit. Further, a door phone 5 is installed at the entrance of the dwelling unit, and the visitor can notify the resident of his/her visit by pressing the call switch 51 of the door phone. In this case, even if the visitor is an unexpected visitor who arrives at the entrance of the dwelling unit without talking to the resident of the dwelling unit at the common entrance, the resident of the dwelling unit will arrive at the entrance of the dwelling unit via the television receiver 4. Visitors can be observed from inside the dwelling unit without opening the door of the dwelling unit.

[Effects of the Invention] As described above, according to the present invention, a television receiver is provided in each dwelling unit, and a television camera is provided in the common entrance and near the entrance of each dwelling unit, and in each dwelling unit, the television receiver in the dwelling unit allows By making it possible to switch between displaying images near the common entrance and the entrances of each housing unit, it is now easier to confirm the number of visitors to each housing unit. Furthermore, the present invention can be realized with a simple configuration of using only one two-transfer relay for each dwelling unit, without adopting a complicated method such as video multiplexing. Furthermore, if the switching is performed in conjunction with the call operations on the common entrance machine and the residential unit, no operational burden will be imposed on the user.

[Brief explanation of drawings]

FIG. 1 is a connection diagram of an intercom system according to an embodiment of the present invention, and FIG. 2 is a connection diagram of an intercom system according to an embodiment of the invention.
FIG. 3 is a circuit diagram showing a video switching circuit for each door. 1: Common entrance unit, 2: Entrance camera, 3: Residential unit unit, 4: Television receiver, 6: Door phone camera, 7: Floor adapter, 71: Transmission control unit, 72: Video display control unit, 73.7
4: Relay contact, 75: Relay, 8: Communication line, 9: Transmission line, 10: Video line (coaxial cable).

Claims (1)

[Claims] 1. A telephone communication means, a video reception means, and a first
a video imaging means provided at the common entrance, a calling communication means and a second video imaging means, and a video imaging means provided between the first and second video imaging means and the video reception means; 1. An intercom system comprising video switching means for selecting one of the video signals output from the video signal receiving means and transmitting the selected video signal to the video receiving means. 2. The intercom system according to claim 1, wherein the video switching means controls switching of the video signal in response to a dwelling unit calling signal from the calling means at the common entrance.